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Cooling tower nozzles plugs

Cooling tower nozzles plugs

Cooling tower nozzles plugs

(OP)
It has been suggested that the nozzles in our cooling tower's de-icing valve trough be plugged during the summer months to improve the tower's performance, and then be unplugged before the winter to prevent freezing.

The de-icing trough has 2 rows of nozzles in addition to the de-icing valve slots.  The nozzles are inboard of the de-icing valve slots which are on the outer edge of the trough. The two rows of nozzles are spaced about 10 inches apart (radially) and about every 12 inches around the tower.  The water in the trough will likely be about 16 inches deep. There are about 1300 nozzles in the trough.
  
To avoid having to install and remove the 1300 plugs one at a time, do you have any suggestions?  I've considered putting rubber mats over the area of the nozzles, with the mats tied off to the knee rail.  Before the winter, the mats will be removed from the trough.  I've also thought about putting plastic "cups" into the nozzle holes.  A string will be attached to every 10 cups.  Although the cups will have to be installed one at a time, they could be removed 10 at a time by pulling on the string.




    

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